Imaging and anatomical characteristics of patients
| Characteristic | Dolichoectasia | Fusiform | Transitional |
|---|---|---|---|
| Location (n=58) | |||
| Vertebral | 0 | 17 | 0 |
| Basilar | 4 | 3 | 4 |
| Vertebrobasilar | 2 | 3 | 21 |
| Vertebrobasilar-cerebral | 0 | 0 | 3 |
| Basilar-cerebral | 0 | 1 | 0 |
| Percentage | 10.3% | 41.3% | 48.3% |
| Maximum diameter, mm | |||
| Vertebral | N/A | 8.8 (6–12.5) | N/A |
| Basilar | 7.6 (5.5–10) | 11.7 (8.5–14) | 13.6 (7–19) |
| Vertebrobasilar | 11.5 (7–16) | 8 (7–9) | 13.5 (5.5–20) |
| Vertebrobasilar-cerebral | N/A | N/A | 10.1 (8–13) |
| Basilar-cerebral | N/A | 5 | N/A |
| MRI findings (n=53) | |||
| Mass effect | 2 (33.3%) | 10 (41.6%) | 16 (57.1%) |
| T1 hyperintensity | 1 (16.6%) | 4 (16.6%) | 8 (28.6%) |
| Thrombus | 0 (0%) | 7 (29.1%) | 8 (28.6%) |
| Established infarcts in the posterior circulation territory | 2 (33.3%) | 6 (33.3%) | 14 (50%) |